Current-induced magnetization dynamics in two magnetic insulators separated by a normal metal
arXiv:1405.2267 · doi:10.1103/PhysRevB.90.054401
Abstract
We study the dynamics of spin valves consisting of two layers of magnetic insulators separated by a normal metal in the macrospin model. A current through the spacer generates a spin Hall current that can actuate the magnetization via the spin-transfer torque. We derive expressions for the effective Gilbert damping and the critical currents for the onset of magnetization dynamics including the effects of spin pumping that can be tested by ferromagnetic resonance experiments. The current generates an amplitude asymmetry between the in-phase and out-of-phase modes. We briefly discuss superlattices of metals and magnetic insulators.
9 pages, 5 figures
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Cited by in corpus (5)
- Theory of spin Hall magnetoresistance (SMR) and related phenomena
- Magnetization damping in noncollinear spin valves with antiferromagnetic interlayer couplings
- Magnetization dynamics in synthetic antiferromagnets: Role of dynamical energy and mutual spin pumping
- Spin Waves in Ferromagnetic Insulators Coupled via a Normal Metal
- Spin-current driven spontaneous coupling of ferromagnets